I never liked fantasy, and while I watched TNG religiously as a kid, these days I'd prefer Gilmore Girls (well, before it got super-dramatic in season 6 or so) over Star Trek soap-wise.

My vote for best tv/film science fiction would probably go to the new Battlestar Galactica, especially the pilot and the first season (halfway through the second season quality dropped somewhat, down to the level of some of the better Star Trek episodes I guess).

Taken takes second, The Outer Limits third, and I'll always have a soft spot for Space: Above and Beyond.

_________________Say, can you feel the thunder in the air? Just like the moment ’fore it hits – then it’s everywhereWhat is this spell we’re under, do you care? The might to rise above it is now within your sphereMachinae Supremacy – Sid Icarus

I saw some of TOS back in the early 80s but became a real fan since TNG. Something that I like about TNG and the newer series, is how their view-screens, computer interfaces, etc is still believable today after decades. Another favourite of mine is Buck Rogers. Unfortunately BR looked dated even when it came out. TNG was released in the same decade (+-5years apart) as BR and looks decades ahead in technology.